Deep knowledge is not knowledge of the thing itself, but knowledge of a thing like the thing. Then, you gain not one knowledge, but two knowledges. Of the thing. And of the original thing with is like the thing. Which is the barbarism of the privileged class.
When you want to put something into your part that is not in the play, you must ask the author-or some other author-to lead up to the interpolation for you. Never forget that the effect of a line may depend not on its delivery, but on something said earlier in the play, either by somebody else or by yourself, and that if you change it, it may be necessary to change the whole first act as well.
When the horrors of anarchy force us to set up laws that forbid us to fight and torture one another for sport, we still snatch at every excuse for declaring individuals outside the protection of law and torturing them to our hearts content.